Mission #16: A Spear in the Dark
Since you'll be stuck on hostile Pluto, you can only customize your squad before this mission - you'll need a vehicle with plenty of punch but with some speed as well as heat-seaking missile jamming capacity. EMPs and MFACs will work fine.

The cybrids have forced the dropship to drop the hercs all across the Pluto landscape. As the mission begins, you'll be facing two cybrid goads who should be easy meat for you. Wait until your squadmates manage to defeat their own cybrid attackers and make their way toward you, then head to Nav Icehawk. Watch out for cybrids who will attack from all different directions. As you see Caanon's pod, send your squad down to it and watch out for a number of cybrids who will start charging into the area soon after. Concentrate all fire on each cybrid as it appears.

Mission #17: Bowels of the Night
The good news is that you get to fight with Caanon. The bad news is that he doesn't really care for fighting with you - he'll charge ahead to Nav Omega no matter what happens to you. The entire trip to Nav Omega is literally swamped with hoards of cybrids, including a batch of very tough platinum guard hercs. Caanon will just blast his way through anything in front of him and keep going, so try to keep up as much as you can - he'll probably outrun you anyway.

At some point Caanon will stop to duel some cybrids - use that opportunity to keep up with him and take on whomever he is not dueling. Once the cybrids are taken care of, you can wipe out the nexus with ease.